Re: G11 Dual Axis & G8 Single Axis Configration #configuration


Khalid Baheyeldin
 

On Tue, May 4, 2021 at 07:20 AM, Kokoro San wrote:
another one is G8 with 180 teeth + gear reduction 150:1
That is your problem: extremely high gear reduction.

I also have a mount with a 180 worm wheel (Vixen SXD), and use 200 step motors
with 18:1 gear reduction.

My spreadsheet is like this:

200 step, 1/32, 18:1, 180 = 57600 steps per degree.

This is close to the 61,200 recommended limit.

For you to get that, you need:

200 step, 1/4, 150:1, 180 = 60000 steps per degree.

If you use a TMC StepStick it will do interpolation of microsteps, and 1/4 may work.

So the TMC5160 should work, in theory.

But per the spreadsheet, at 3 deg/sec slewing, the motors are doing 13,500 RPM, and
would most likely stall at this speed. Reducing the slewing speed to 1 deg/sec makes
it 4,500 RPM. Maybe that would work.

But you are certainly better off with less reduction. Somewhere between 10:1 to 15:1.

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